The data structure Array

So far, we have given each variable an individual name. This is impractical, if many variables are necessary that are treated in the same way and are of the same type, such as, for example, if a table of data is to be constructed. In this case, we wish to give the entire set of data a name and to denote individual elements with an identifying number, a so-called index. The data type is then said to be structured — more precisely: array structured. In the following example, the variable a consists of N elements, each being of type CARDINAL, and the indices range from 0 to N-1.